package com.ks.lijin.aspect;
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import com.ks.lijin.service.manager.RedisManager;
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import com.ks.lijin.util.annotation.RedisCache;
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import com.ks.lijin.util.annotation.RedisCacheEvict;
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import org.aspectj.lang.ProceedingJoinPoint;
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import org.aspectj.lang.Signature;
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import org.aspectj.lang.annotation.Around;
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import org.aspectj.lang.annotation.Aspect;
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import org.aspectj.lang.reflect.MethodSignature;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.core.DefaultParameterNameDiscoverer;
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import org.springframework.core.annotation.Order;
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import org.springframework.expression.EvaluationContext;
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import org.springframework.expression.Expression;
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import org.springframework.expression.ExpressionParser;
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import org.springframework.expression.spel.standard.SpelExpressionParser;
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import org.springframework.expression.spel.support.StandardEvaluationContext;
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import org.springframework.stereotype.Component;
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import org.yeshi.utils.StringUtil;
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import javax.annotation.Resource;
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import java.lang.reflect.Method;
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@Component
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@Aspect
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@Order(4)
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public class RedisCacheAspect {
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Logger logger = LoggerFactory.getLogger(RedisCacheAspect.class);
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@Resource
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private RedisManager redisManager;
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private ExpressionParser parser = new SpelExpressionParser();
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private DefaultParameterNameDiscoverer nameDiscoverer = new DefaultParameterNameDiscoverer();
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/**
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* 获取表达的值
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*
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* @param spELString
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* @param joinPoint
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* @return
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*/
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public String generateKeyBySpEL(String spELString, ProceedingJoinPoint joinPoint) {
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MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
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String[] paramNames = nameDiscoverer.getParameterNames(methodSignature.getMethod());
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Expression expression = parser.parseExpression(spELString);
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EvaluationContext context = new StandardEvaluationContext();
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Object[] args = joinPoint.getArgs();
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for (int i = 0; i < args.length; i++) {
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context.setVariable(paramNames[i], args[i]);
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}
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return expression.getValue(context).toString();
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}
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private String getRedisKey(RedisCache cache, ProceedingJoinPoint joinPoint) {
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return cache.cate() + "#" + generateKeyBySpEL(cache.key(), joinPoint);
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}
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private String getRedisKey(RedisCacheEvict cache, ProceedingJoinPoint joinPoint) {
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String key = cache.key();
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String keyPrefix = cache.keyPrefix();
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String cacheKey = cache.cate() + "#" + (StringUtil.isNullOrEmpty(key) ? generateKeyBySpEL(keyPrefix, joinPoint) : generateKeyBySpEL(key, joinPoint));
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return cacheKey;
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}
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@Around("execution(public * com.ks.app.service..*.*(..))")
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public Object requestSerializable(ProceedingJoinPoint joinPoint) throws Throwable {
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Signature signature = joinPoint.getSignature();
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MethodSignature methodSignature = (MethodSignature) signature;
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Method targetMethod = methodSignature.getMethod();
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Method realMethod = null;
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RedisCache redisCache = null;
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RedisCacheEvict[] redisCacheEvicts = null;
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try {
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realMethod = joinPoint.getTarget().getClass().getDeclaredMethod(joinPoint.getSignature().getName(),
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targetMethod.getParameterTypes());
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if (realMethod.isAnnotationPresent(RedisCache.class)) {
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redisCache = realMethod.getAnnotation(RedisCache.class);
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} else {
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redisCacheEvicts = realMethod.getAnnotationsByType(RedisCacheEvict.class);
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}
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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} catch (SecurityException e) {
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e.printStackTrace();
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}
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if (redisCache != null) {
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String cacheKey = getRedisKey(redisCache, joinPoint);
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if (!StringUtil.isNullOrEmpty(cacheKey)) {
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try {
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Object result = redisManager.getDataFromRedis(cacheKey);
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if (result != null) {
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return result;
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}
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} catch (Exception e) {
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logger.error("redis获取缓存出错", e.getMessage(), "key：" + cacheKey);
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}
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}
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}
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Object object = joinPoint.proceed();
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//不异常
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if (realMethod != null) {
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//不缓存空值
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if (redisCache != null && object != null) {
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String cacheKey = getRedisKey(redisCache, joinPoint);
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if (!StringUtil.isNullOrEmpty(cacheKey)) {
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try {
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redisManager.setDataToRedis(cacheKey, object, redisCache.second());
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} catch (Exception e) {
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logger.error("redis保存缓存数据出错", e.getMessage(), "key：" + cacheKey);
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}
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}
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} else if (redisCacheEvicts != null && redisCacheEvicts.length > 0) {
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for (RedisCacheEvict redisCacheEvict : redisCacheEvicts) {
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String key = redisCacheEvict.key();
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String cacheKey = getRedisKey(redisCacheEvict, joinPoint);
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if (!StringUtil.isNullOrEmpty(cacheKey)) {
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try {
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if (!StringUtil.isNullOrEmpty(key)) {
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redisManager.remove(cacheKey);
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} else {
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redisManager.removePrefix(cacheKey);
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}
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} catch (Exception e) {
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logger.error("redis清除缓存数据出错", e.getMessage(), "key：" + cacheKey);
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}
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}
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}
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}
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}
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return object;
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}
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}
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class ParamsTypeValue {
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Class<?> type;
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Object value;
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public ParamsTypeValue(Class<?> type, Object value) {
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this.type = type;
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this.value = value;
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}
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public ParamsTypeValue() {
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}
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}
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